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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Jan. 31, 2015
Jan. 31, 2014
Accounts receivable, allowance for doubtful accounts $ 850us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,711us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred shares, par value $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred shares, shares authorized 10,000,000us-gaap_PreferredStockSharesAuthorized 10,000,000us-gaap_PreferredStockSharesAuthorized
Preferred shares, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common shares, par value $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common shares, shares authorized 200,000,000us-gaap_CommonStockSharesAuthorized 200,000,000us-gaap_CommonStockSharesAuthorized
Common shares, shares issued 130,502,864us-gaap_CommonStockSharesIssued 147,309,575us-gaap_CommonStockSharesIssued
Common shares, shares outstanding 130,502,864us-gaap_CommonStockSharesOutstanding 147,309,575us-gaap_CommonStockSharesOutstanding